The correct option is C PCR and RAPD
In vitro clonal propagation
The generation of genetically identical plants under lab conditions using micropropagation is called in vitro clonal propagation.
Microscopy
Microscopy is a technique for study of microorganisms and cells with the help of a microscope.
PCR and RAPD
Polymerase chain reaction (PCR) is a technique in which a very small sample of DNA is amplified and millions of clonal copies can be made.
RAPD (Random amplified polymorphic DNA) is a PCR based technique for identifying genetic variation. RAPD is used to access the genetic stability of the clones.
Northern blotting
Northern blotting is a technique used to detect specific RNA molecules from a mixture of RNAs.
Electrophoresis and HPLC
Electrophoresis is a technique of separation of genetic material like DNA/RNA or protein molecules on the basis of their size.
HPLC stands for High Performance Liquid Chromatography, and is useful in purification and separation of various monoclonal antibodies, interferons, etc.